Chromatic

[Sarah]

Proceeding by the smaller intervals (half steps or semitones)of the scale, instead of the regular intervals of the diatonic scale.

[Sarah]

Someone who is so bipolar, that everything they say has a different emotion to it, so you never know what to expect.
Also a wide-range of emotions in a short time. This is not considered classy in any way.

[Sarah]

Synonym for colourful.

[Cami]

Relating to or using notes not belonging to the diatonic scale of the key in which a passage is written.